.banner {
  margin-bottom: 2em;
}
.banner img {
  width: 100%;
}
.title {
  position: relative;
  top: -0.7em;
  width: 56%;
  margin: 0 auto;
  background-color: #fff;
  font-size: 1.5em;
  text-align: center;
  color: #1c91dd;
}
/* 风险评估 */
.function {
  border-top: 1px solid #ccc;
}
.function .title {
  position: relative;
  top: -0.7em;
  width: 30%;
  margin: 0 auto;
  background-color: #fff;
  font-size: 1.5em;
  text-align: center;
  color: #1c91dd;
}
.function .list {
  padding: 0;
  display: flex;
  justify-content: space-around;
}
.function .list li {
  list-style: none;
  width: 25%;
  text-align: center;
}
.function .list li div {
  width: 5em;
  height: 5em;
  border-radius: 50%;
  margin: 0 auto;
  line-height: 5em;
}
.function .list li div img {
  height: 65%;
}
.function .list li p {
  margin-top: 0.5em;
  font-size: 1em;
  font-family: "微软雅黑";
}
.function .list li:nth-of-type(1) div {
  background-color: #1c91dd;
}
.function .list li:nth-of-type(2) div {
  background-color: #21b06e;
}
.function .list li:nth-of-type(3) div {
  background-color: #fab400;
}
.function .list li:nth-of-type(4) div {
  background-color: #ab5de9;
}
/* 专业咨询 */
.major {
  margin-top: 1em;
  margin-bottom: 2em;
}
.major ul {
  display: flex;
  flex-wrap: wrap;
  padding: 0;
}
.major ul li {
  width: 33.3%;
  list-style: none;
}
.major ul li img {
  width: 100%;
}
.major ul li div {
  padding-left: 1em;
}
.major ul li div h4 {
  font-family: "黑体";
}
.major ul li div p {
  color: #666;
  font-size: 0.7em;
}
.major ul li:nth-of-type(even) {
  background-color: #f5f5f5;
}
/* 人体工学介绍与应用 */
.human {
  border-top: 1px solid #ccc;
}
.human .info {
  position: relative;
  width: 100%;
  height: 9em;
}
.human .info img {
  width: 100%;
  height: 100%;
}
.human .info .cont {
  position: absolute;
  left: 0;
  top: 0;
  transform: translateX(-100%);
  width: 40%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  color: #fff;
  padding: 1em;
  transition: all 0.5s;
}
.human .info .cont h4 {
  font-size: 1.2em;
  font-weight: 700;
}
.human .info .cont span {
  display: inline-block;
  width: 3.5em;
  height: 1.5em;
  border: 1px solid #fff;
  text-align: center;
  line-height: 1.5em;
  margin-top: 0.2em;
}
.human .info:hover .cont {
  transform: translateX(0%);
}
/* 职业应用 */
.profession {
  margin-top: 0.8em;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
.profession .app,
.profession .personal {
  width: 49.5%;
  height: 3.5em;
  line-height: 3.5em;
  text-align: center;
}
.profession .app span,
.profession .personal span {
  color: #fff;
  margin-left: 0.3em;
  font-weight: 700;
}
.profession .app img,
.profession .personal img {
  height: 70%;
  vertical-align: middle;
}
.profession .app {
  background-color: #55acee;
}
.profession .personal {
  background-color: #3b5998;
}
.profession .other {
  margin-top: 0.3em;
  width: 100%;
  height: 3.5em;
  background-color: #363a42;
  text-align: center;
  line-height: 3.5em;
}
.profession .other span {
  color: #fff;
  margin-left: 0.3em;
  font-weight: 700;
}
.profession .other img {
  height: 35%;
  vertical-align: middle;
}
.contact {
  margin-top: 1.3em;
  margin-bottom: 6.5em;
  border-top: 1px solid #ccc;
}
.contact .title {
  width: 30%;
}
.contact ul {
  padding: 0;
}
.contact ul li {
  list-style: none;
  margin-bottom: 0.5em;
}
.contact ul li span {
  display: inline-block;
  width: 2em;
  height: 2em;
  border: 2px solid #ccc;
  vertical-align: middle;
  text-align: center;
  line-height: 1.5em;
  margin: 0 0.5em 0 1em;
}
.contact ul li span img {
  height: 60%;
}
.contact .map {
  width: 100%;
  height: 15em;
  overflow: hidden;
}
.nav {
  height: 5em;
  width: 100%;
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 999;
}
.nav ul {
  display: flex;
  padding: 0;
  margin-bottom: 0;
}
.nav ul li {
  padding-top: 1em;
  width: 25%;
  list-style: none;
  text-align: center;
  background-color: #f5f5f5;
}
.nav ul li img {
  height: 40%;
}
.nav ul li img:nth-of-type(2) {
  display: none;
}
.nav ul li p {
  margin-top: 0.3em;
  color: #666;
  margin-bottom: 0.1em;
}
.nav ul li:hover {
  text-align: center;
  background-color: #1c91dd;
}
.nav ul li:hover p {
  color: #fff;
}
.nav ul li:hover img:nth-of-type(2) {
  display: inline-block;
}
.nav ul li:hover img:nth-of-type(1) {
  display: none;
}
